Member #358927

I ordered three of these sensors through a supplier in the UK (Hobby-Electronics) and all three are wired different from the images shown on both the sparkfun as on the hobby-electronics website. My three sensors have the red and black wire reversed so the wiring then becomes even stranger than before:
- Red: Signal, alert.
- Brown: Ground.
- Black: Vin (9 volt battery).

I first tried wiring the sensor as shown on the datasheet and that didn’t give a good signal. The output signal became around 2V and remained constant around that value.

When I reversed the wiring (black to +9V, red as signal) the output signal was as it is supposed to be.

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